14 NORTH AMERICAN FAUNA 61, FISH AND WILDLIFE SERVICE 



a foothold in the western Aleutians but have not been observed to 

 the east, even though some of them also occur on the Alaskan 

 mainland. Concerning the plant distribution, Hulten (1937a, p. 

 44) stated, 



If Commander Islands and westernmost Alaska Penin. are included, as in 

 this flora, 92 America species reach that area, but 47 of them do not go 

 further westward than to Umnak. 49 species reach the Aleutians from 

 the west but not other parts of southern Alaska. 40 of them do not reach 

 further eastwards than to the westernmost group of the Aleutians. 



Some of the prominent Asiatic forms that we observed in the 

 westernmost Aleutians are Cirsium kamtschaticum, Veratrum 

 album oxysepalum, Cacalia ariculata, and Sorbus sambucifolia. 

 These are confined to the Near Islands, though some are thought 

 to have reached as far east as Buldir. 



Hulten says further, "The flora of the middle Aleutians is 

 very depauperated, probably due to the relatively short time 

 elapsed since the glacial period, when most of their plants were 

 exterminated." 



Only the more obvious Asiatic elements are mentioned here. 

 Other animal and plant forms probably originated in Siberia 

 at a more remote time. 



BERING SEA AVIFAUNA 



The following birds represent a group largely confined to the 

 coastal parts of Bering Sea, although some of them range farther 

 north or south. They appear to be characteristic of all shores 

 of the Bering Sea, instead of the Siberian side exclusively. 



SCIENTIFIC NAME COMMON NAME 



Phalacrocorax pelagieus pelagicus Pelagic cormorant 



Phalacrocorax urile Red-faced cormorant 



Branta canadensis minima Canada goose 



Philacte canagica Emperor goose 



Anas crecca nimia Common teal 



Polysticta stelleri Steller's eider 



Arenaria melanocephala Black turnstone 



Numenius tahitiensis Bristle-thighed curlew 



Erolia ptilocnemis ssp Rock sandpiper 



Limosa lapponica baueri Bar-tailed godwit 



Rissa tridactyla pollicaris Black-legged kittiwake 



Rissa brevirostris Red-legged kittiwake 



Xema sabini woznesenskii Sabine's gull 



Uria lomvia arra Thick-billed murre 



Brachyramphus brevirostre Kittlitz's murrelet 



Cyclorrhynchus psittacula Parakeet auklet 



Aethia cristatella Crested auklet 



